Hardware Troubleshooting Guide - ILX Lightwave OMM-6810B User Manual

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This chapter is intended to be used as a guide when the OMM-6810B does not
perform as expected. It is not a service manual, rather a guide to alleviate basic
problems which may arise during operation.

Hardware Troubleshooting Guide

If you have difficulty operating the 6810B, refer to the symptoms listed here.
Some of the common causes and corrective actions for these symptoms are listed
in this section. If additional symptoms persist, contact your ILX Lightwave
representative.
Symptom
6810B will not power up
Measurement will not stabilize
Display shows "-----"
T
ROUBLESHOOTING
Corrective Action
Check the power cord to make sure that it is properly
•
connected.
• If the above suggestion fails, make sure the line voltage
matches power line voltage.
• The 6810B monitors the stability of the signal under
test. If the wavelength of the signal is changing by more
than 1.0 nm the HOLD indicator is lit and the last good
wavelength is held on the display. Wavelength reading
instability may be caused by excessive noise or
modulation of the laser source. Ensure the laser source
is stable and that there is no intentional modulation.
This condition may occur if the laser has not warmed
up. Most gas laser cavities expand when first turned on.
This expansion can cause intensity fluctuations which
the 6810B interprets as an unstable laser. The most
stable readings are provided when the 6810B is in the
slow update rate.
• Check for tight connections between the instrument and
the measurement head and ensure other "noisy"
electronic devices are not located near the head.
• In cases of low input power and high background light,
try working in a dark environment and be sure to zero
the instrument as described in Chapter 2.
• A measurement probe or head is not connected to the
multimeter.
6
C H A P T E R
101
OMM-6810B
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